Poly dating question...

In talking about polyamory with a potential new Someone, do you relate those conversations to your sweetie(s)? Would you send a blind carbon copy of your explanatory emails to your primary/SO/whatever, just to keep them abreast of everything? Do you feel that doing that is rude to the other (new) party, or it's okay because it's not anything your current partner doesn't know already?

The way this person is asking questions leads me to think he'll drop me, though. I'd be sad, but we haven't even gone out yet, so this is the best time to be dropped. *sigh*